115 Buckingham Palace Road, City of Westminster, Greater London
The menus clearly state that halal food is served.. From the management: 'While we're not a halal restaurant, everything we serve apart from our beef and pork are prepared in a manner suitable for a halal diet. Our chicken is halal.'
Located in the Victoria Station food court. Tortilla is an award-winning Mexican restaurant chain with locations throughout London serving California-style tacos and burritos for eat-in or take-away. All cuisine is made fresh on-site using ingredients of the highest standards from time-tested recipes developed in the taquerias of Mexico & California.
115 Buckingham Palace Road, City of Westminster, Greater London

So I had to come all the way to London to get a decent Halal chicken burrito. And it was pretty good! Set up kind of like Chipotle but with some different flavors.